Screening and concentrating device



H. B. WALLING.

SCREENING AND coNcENTRATlNG DEVICE.

APPLICATION FILED JUNEZ, 1920- Patendsept. 20, '1921.

2 SHEETS-SHEET 2.

vr/ves ses ATTORNEY.

UNITED srlvrizsl "PATENT OFFICE.

HERBERT B. WALLING, OF SALT` LAKE CITY, UTAH.

SCREENING AND CQNCENTRATING DEVICE.

Application filed `Tune 2,

To yall whom t may concern Be itknown thatI, HERBERT B. WALLING, a citizen ofthe United States, residingat SaltLake City, in the county of'Salt Lake and State of Utah, have invented certain new and useful Improvements in a yScreening and Concentrating Device, of whichv the l.

l generally improve'upon devices of this character by providing a device'which will be substantially simple,VVV durable and inexpen-A sive in construction, one which is eiiicient and reliable in operation, and well'adapted to the purposes forwhich it isdesigned.

The invention consists inl the details of construction` and in thecombination and ar-l rangement of the several parts of my im' proved screening and concentrating device whereby certain Vimportant advantages are obtained and Athe, device is rendered more convenient yand advantageous for use than thoseV of.y like character nowcon the market,

all.' asl will be :hereinafter more fully set forth. M i N 5* With these and numerous other objects in view, the AVinvention resides in certainnovel features of construction',y and the combination and arrangement Vof parts -as will be more fully described and especially pointed out lin the appended claims.

In the accompanying drawings: Figure 1 is a side elevation of the device.

Figi?,l is a top plan view of the device. jl: Fig. 3V is a section taken on the line 3-3 of Fig..2. A A

e. Fig. @is a fragmentary side elevation of the device showing portions thereof in section.

Fig. 5 isra fragmentary top plan view of the lower portion of the device.

Fig. 6 isa section taken on the line (Sl-6 of Fig. y5. i

Fig. 7 is a longitudinal section taken through the discharge valve usedin connection'with my invention. i n

Fig. 8- is a perspective View of the screen cleaner. 4 e

. Fig @is ,frasmeetey Side elevation 0f a Specificationy of Letters Patent. Patentedvsept. 20,1921..

192,0..v Serial N0. 385,912.

portion of the screen showing the adjusting.

means for the screen cleaner, and l a Fig. 10 is a' fragmentary side elevation of a portion of the lower portion of thedevice showing a modified form kof operating means.

In the preferred embodiment of my invention S indicates thevscreen generally and T, the tank which is situated below the screen S. It will be vnoted thatthe screenfis inclined while the' tank is substantially horizontal andy that they are connected by means o of the extensionindicated by the letter E, p The screenSconsists of apluralityofv sections'as shown in' Fig. 2 of the drawing and,

of course, the ore enters the screen at theI mouth lbymeansof water and flows overj these various sections so that the yfiner ore', looking at Fig. 2, will pass through the first section and a thicker portion of the ore through the second section et cetera. There may be as many of these sections as may be desired. I

By referring to Fig. 3 of the drawing it will be seenthat cleats 2 are disposed'upon the sides of the screen `for supporting the angleironsf whichin'turn support theffloor 4'. This floor .iris provided'with a plurality of rectangular openings as may be seen 1n' Fig. 2 of the drawingand I have provided theinverted V-'shaped 'angle irons v5 which are'di'sposed along the longitudinal edges of these. openings and are held in place by means of the clips 6 whichI arein turn connectedto the iioorfi bythe bolt and nut indicated bythe numeral 7 Looking at Fig. 9fit,y will be seen that'the angle irons 3 are provided with the vertical rectangular openings 8 which have'the earsextending out-A wardly therefrom at their top and bottom as indicated bythe numerals t9. These ears 9 are Vprovided with threaded'apertures for receiving the set screws l0 which carry vthe boX'll for receiving the rod 12.- Pivotally mounted upon this rod 12 are thev screen cleaning devices as' shown to advantage in Fig. 8 of the drawing.v Each of these screen cleaningdevices 8 tapers toward one endiand is providedv with the plate 12 having the smaller blocks 13 at one end and the largerl blocks 14. at its other end. These smaller blocks 13 are provided with the perforations '1 5 which also extend through the plate 12 for receiving the rod 12. A longitudinally extending slot 16" is provided in theplate 12' adjacent thelargerend for replate 12 may be adjusted as desired for regulating the fineness of vthe ore which it is desired toV pass through the various openfglhe tank T which is disposed immediately below the screening device consists of a plurality of compartments which should be immediately disposed below each compartment of the screening device and should also. be of the same dimensions as to` length and breadth but of course the depth thereof will be considerably greater than the screen. In

each compartment of the tank T thereis av supplementary compartment indicated `by the numeral 2O and is shownto advantage in Figs. 5 and of the drawing. This comi' partment 20 is set offto itself vby means of the partition 21. In the partition 21 there isprovided an opening 22 adjacent the bottom thereof so as to place the compartment 20 into communication with the main compartment 23.v

The compartments 23 form hoppers in the tank and are provided with the spiral v`screws 24,-v the blade of the spiral being cut away so as to form'flattened portions 25 as shown in Fig. 4 of the drawing, these flattenedportions being immediately aboveithe axis 26 of the screws.v A full spiral 4screw 27v is also provided within the hopper and disposed be-y tween and below the screws 24. As is -shown in Fig. 4 of thel drawing the hopper is formed with the V-shaped portion 28 hav-` ing the arcuate extensions 29 which are concentric with the periphery of the blade of thescrews 24. The full spiral 27 is disposed approximately inV the apex of the V-shaped portion 28 and is adapted to deliver theore through the opening 22 into the supplementary compartment 20. f.

' In order to operate the fragmentary spiral screws 24 I have provided the cranks 30 upon' the ends of the axles thereof which cranks 30 are connected to the reciprocating rod 31 thus giving anoscillatory movement to the fragmentary spiral screws 24. This reciprocating rod 31 may be operated by any suitable means. Upon the axles ofthe full spirals 27 I have provided the gear wheels 32 which are in mesh with the worm gear 33 on the rod 34. This rod 34may be rotated 'by any suitable means.

lIn Fig. 10 I have shown a modified form of operating means which is to be used when it is desired to oscillate the full spiral screw 27 instead of rotating same. This modification consists of the cranks 30 and reciprocating rod 31 and also the gear wheel 32 but it will be noted that this gear 32 is provided with the squared knob 35 so that -thearm 36 which is pivoted to a portion of the reciprocating rod 31 and has the forked portion 37 may embrace this knob 35 and thus the reciprocation of the rod 31 will` impart oscillatory movement to the full spiral screw 27. It should be understood that the forked portion has a sufficiently large slot so as'l to allow for the movement of the rod 31.'

In Figs. 5, 6 and 7 of the drawing I have illustrated a discharge valve which is to be used in the supplementary compartment v20. This discharge valve consists of the casing 40 having the spout 41 intermediate its ends and this casing is provided with the openings 42 which are disposed diametrically opposite the spout 4'1. vWithin the 'casing 1s disposed the valve member 43 having the knob 44 at one end vand it will be noted that the valve member 43 is hollow and is open at the bottom so .that the liquidV may pass therethrough. An elongated slot 44 is providedl in the body portion so that the valve portion 43.v may be rotated so as to take this slot 44 in alinement with the spout 41. It will also be seen -that this valvemember is' capable of vertical movement thus allowing more or lessliquid to How through the openingv 42 into the casing. The pulp as it is so thatit will rush through thedischarge valve. The discharge valve can bei adjusted so as tofeed from thebottom and'save the will sufficiently lessen the density of the pulp necessity of shovelingout the bottom of thisV compartment 20 and I have foundn by experience thatthis siphon willf work very efiifV ciently. Y

From the foregoing description, it is thought that the. screening andconcentratingdevice constructed in accordance with my invention isof anextremely simpleand comparatively yinexpensive nature and is practically well adapted for use by reason of the convenience'and facility with which it may be assembled and adjusted, and it will also be obvious that my invention is'susceptible of some change andmodification without material departure from the principle'gand spirit and for this reason I do not `wish .to be understood as limiting myself tothe precise arrangement and formation ofthe several parts herein 'shown in carrying 'out my invention in practice.4

Having thus described my invention what scribed comprising a floor having a plurality of openings therein, agitating plates pivotally carried below said openings, means for oscillating said plates, and means'for vertically adjusting the pivot point of said plates.

2. A vscreening device of Ithe class described comprising a floor having a plurality of openings, agitating plates formed so as to taper toward one end pivotally carried at theirsmaller ends, means for vertically adjusting lthe pivot of said plates, a longitudinal slot provided inV each plate,

" crank shafts provided `in saidscreening device so that thek cranks thereof will be udisposed in said slots, means for oscillating said crank shafts whereby the larger end of said plate will be raised and lowered.

3. A screening device of the class described comprising a floor having a plurality of rectangular openings, agitating plates situated below said openings, a rod passing through one end of said plates, means for adjusting said rod vertically,`and means provided for oscillating said plates upon said rod.

In testimony whereof I aiiiX my signature in presence of two witnesses.

HERBERT B. WALLING.

Witnesses V S. M. MCKINNEY. AUSTIN P. MILLER. 

